CC BY
7
Секция «Метрология, стандартизация и сертификация»
УДК:621.787
METROLOGICAL SUPPORT OF THE PRODUCTION TECHNOLOGY OF THE WAVEGUIDES IN THE MILLIMETRE RANGE OF WAVELENGTHS
V.I. ТпГапоу, E. A. КагеНпа Scientific Supervisor - I. V. ТпГапоу
Reshetnev Siberian State University of Science and Technology 31, Krasnoyarsky Rabochy Av., Krasnoyarsk, 660037, Russian Federation E-mail: sibgau-uks@mail.ru
There is the analysis of the technology of manufacturing waveguides mm-wavelength range. The choice of devices to control the accuracy and roughness of the working surface of waveguide channels is justified.
Keywords: waveguide, operating range, types of technology, measuring instruments.
МЕТРОЛОГИЧЕСКОЕ ОБЕСПЕЧЕНИЕ ТЕХНОЛОГИИ ИЗГОТОВЛЕНИЯ ВОЛНОВОДОВ ММ-ДИАПАЗОНА ВОЛН
В.И. Трифанов, Е.А.Карелина Научный руководитель - И.В. Трифанов
Сибирский государственный университет науки и технологий имени академика М. Ф. Решетнева Российская Федерация, 660037, г. Красноярск, просп. им. газ. «Красноярский рабочий», 31
E-mail: sibgau-uks@mail.ru
Представлен анализ технологии изготовления волноводов мм-диапазона волн. Обоснован выбор приборов для контроля точности и шероховатости рабочей поверхности каналов волноводов.
Ключевые слова: волновод, рабочий диапазон, виды технологии, измерительные приборы.
Progress in the field of short millimeter and submillimeter waves has become one of the most important areas of radio electronics development in recent years [1]. This is due to the identification of a huge spectral resource in these frequency ranges and new opportunities for solving research problems in the fields of radio communication, astronomy, imaging, biomedicine and other areas. For example, the measuring equipment operating in the range 110...170 GHz is created, the development of equipment operating in the ranges up to 1...3 THz is also underway.
With the industrial development of new, higher frequency ranges, the most important issues are the execution of waveguides and flange connections. Hollow single-mode rectangular waveguides are used as the main waveguide path of millimeter-band systems in Russia and abroad in the range up to 325 GHz [2], for example, from section 11x5.5 mm to 0.7x0.35 mm.
In the manufacture of waveguides, the higher the frequency range of the measuring device used, the more closely the tolerances on the basic geometric dimensions of the waveguides used and the connecting dimensions of the waveguide flanges. This applies both to the accuracy of compliance with the geometric dimensions of the waveguides a and b, and to the observance of a strictly rectangular cross-sectional shape, because these dimensions are frequency-dependent (the size tolerance can be ± 0.008 mm). For the manufacture of conventional single-mode rectangular waveguides, including those intended for operation in the short-wave part of the millimeter wave range, one of the following technologies is usually used: technology of drawing a round pipe with respect to a rectangular mandrel;
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technology of galvanic build-up; technology of mechanical processing (milling channels); technology of electroerosion treatment and anodic-abrasive polishing.
The use of electroplating technology allows to provide the higher accuracy of geometric dimensions. Higher manufacturing cost, limited length of the segments that can be obtained are the disadvantages of this technology (when we are using electroplating up to 50^60 mm, in the mechanical manufacture of channels up to 150-200 mm). The geometry and connecting dimensions of the flanges, which are used in the millimeter wave range, are set in accordance with state standard 13317-89.
An important characteristic of the surface quality of the waveguide channels is the roughness Ra 0.20.04 ^m, which can significantly affect the electrical losses and SWR. The MarSurf M400 can be recommended for monitoring surface undulation and roughness at a length of 0.08 mm or more in small cross-section channels, which allows you to produce a feeling of micro-roughness with a high-precision probe system. The device is characterized by a rapid change of the probe consoles due to the magnetic mount. The probe consoles have a length from 36.5 to 81.5 m, a transverse probe size is 4 mm, a probe contact size is 2 mm, which allows to measure the surface roughness in the channels with a cross section from 4.4 mm or more and a length up to 80 mm.
The probe console with a length of 36.5 mm with a transverse probe size of 0.7 mm and a probe contact size of 0.1 mm can be used to control the surface roughness of small-section waveguide channels.
A significant advantage of the device is the flexibility of movement due to wireless connection A significant advantage of the device is the flexibility of movement due to wireless connection [3], the portability due to battery life, as well as compliance with international requirements of ISO standards, and a high measurement speed is 1 mm per second. It is easy to pick up information from built-in thermal printer which shows us a profilogram.
Large instrumental microscope LMI-1 can be used to control the accuracy of the geometric dimensions of the waveguides. LMI-1 allows measuring the channels, which length is up to 150 mm and a width - 50 mm with a precision of 5 ^m. The proposed measuring instruments are approved type devices on the territory of Russia.
The analysis of the technology of manufacturing waveguides mm-wave range of rectangular cross-section has been performed. Also devices for monitoring the geometric dimensions and surface roughness of waveguides have been proposed.
References
1. Sharov G.A. Volnovodnye ustroystva santimetrovykh i millimetrovykh voln [Waveguide devices of centimeter and millimeter waves]. Moscow. Goryachaya liniya-Telekom, 2016, P. 507-509.
2. OST 4.206.000 Ustroystva SVCh. Kanaly volnovodnye pryamougol'nye [Microwave device. Channels of rectangular waveguide].
3. Katalog sredstv izmereniy geometricheskikh velichin Mahr [Catalog of measuring instruments of geometric quantities Mahr], 2011, P.12-15.
© Trifanov V.I., Karelina E. A., 2019
